Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for repairing the inner surface of a nuclear reactor shroud, shroud obtained by said method

A repair method and technology for nuclear reactors, which are applied in the field of maintenance of nuclear reactors and can solve problems such as inability to achieve weld volume inspection.

Active Publication Date: 2017-12-01
FRAMATOME ANP
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The method in EP691658 cannot realize the volume inspection of weld seam (volume inspection)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for repairing the inner surface of a nuclear reactor shroud, shroud obtained by said method
  • Method for repairing the inner surface of a nuclear reactor shroud, shroud obtained by said method
  • Method for repairing the inner surface of a nuclear reactor shroud, shroud obtained by said method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] In one exemplary embodiment, the enclosure is a tank that houses a nuclear reactor core (ie, a nuclear fuel assembly). Hereinafter, it is designated by the acronym RPV (Reactor Pressure Vessel). In this case, the hood comprises a dome-shaped lower bottom carrying the trough bottom penetration. The groove bottom penetration structure is a hole arranged in the bottom of the dome-shaped groove, and a pipe body is arranged in a sealable manner in the hole, so that the measuring probe can be introduced into the groove and the detector can be removed from the groove. removed from the slot. These detectors enable measurements of neutron flow or temperature within the reactor core.

[0034] The tank also includes a tank cover with a plurality of holes in which a tap is sealably secured. These cocks allow passage of thermocouples or mechanisms for moving control rods.

[0035] According to another exemplary embodiment, said enclosure is part of a pressurizer and includes an ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The method comprises the following steps: - depositing a buttering (19) with a closed contour on the inner surface (3) around the defined area (1); installing a cap (27) at the defined area (1); forming a weld (29) to weld the cap (27) to the buttering (19). The cap (27) comprises a concave area (31), the concavity of which is turned away from the defined area (1), the method comprising a step of radiographically inspecting the weld (29), carried out by placing a radioactive source (33) in the concave area (31).

Description

technical field [0001] The present invention generally relates to maintenance of nuclear reactors. Background technique [0002] More specifically, according to a first aspect, the invention relates to a method of repairing a defined area of ​​the inner surface of a nuclear reactor enclosure, the method comprising the steps of: [0003] depositing a pre-surfacing weld having a closed contour around the defined area on the inner surface; [0004] placing a cover at the defined area; [0005] A weld is formed to weld the cover to the pre-surfacing weld. [0006] EP691658 describes a repair method for the replacement of tubes penetrating the bottom of a tank containing a nuclear reactor core. [0007] The pipe body, also known as the bottom penetration pipe, is used to introduce detectors such as neutron detectors or temperature detectors into the reactor core, or to remove the detectors from the reactor core. [0008] The method in EP691658 does not enable volume inspectio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G21C13/036G21C13/067
CPCG21C13/036G21C13/067Y02E30/30
Inventor 布赖斯·马萨扎
Owner FRAMATOME ANP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com